lower rad hose heater reaction time

crushers · 02-10-07, 12:47 PM

test unit: 1990 LJ78

time 11:05 11:08 11:15 11:20 11:30
upper hose -6.5F -6.5F 2.5F 6.0F 18.1F
lower hose -6.5F 31.4F 81.4F 81.8F 68.0F
upper rad -6.5F -6.5F 1.3F 1.4F 5.8F
Block front -7.8F - 5.4F 3.6F 10.7F 15.4F
head rear -9.1F -7.5F -2.1F -3.6F -2.6F

cheers

brownbear · 02-10-07, 08:43 PM

good info. They heat up nice and quick.

light_duty · 02-11-07, 01:38 AM

confirms what those who use these units knew already...they work. Thanks for the info, Wayne.

Mark W · 02-11-07, 01:47 AM

Unimpressive heating at te back of the engine though. I've never understood why anyone would use a rad hose heater. Why waste all that heat into the radiator where it just radiates to the air, instead of keeping the circulation in the engine?

Freeze plug heater is the way to go.

Mark...

crushers · 02-11-07, 06:37 AM

respectfully disagree,
the block heater is not an option on some model engines (HDT,1HZ).
i agree about the head but the location for the temp reading was at the very highest back corner of the head and only after 25 min of heating.

also, the ease of install of the lower rad hose heater makes it very appealing.

you need airflow to pass through the rad to do much in the way of cooling the tempts and i found the front of the block heated up much faster than the rad did showing the coolant was heating the block first similar to the block heater.
i am satisfied with the lower rad hose heater.

what would be interesting is doing the same test with a block heater to compare the findings.

location of testing:
upper hose was rad side of the thermostate housing
lower hose was just above the heater
upper rad was the furthest corner away from the upper inlet for the hose (coldest corner upper part of the rad)
block front was under the head front upper corner
head rear was the furthest corner away from the heat source just below the tappet cover back corner.

hummm, this just brought up another question...maybe the head coolant passeges design is the problem with the 2LT heads, if htey are not warming up properly in the back corners then mayb ethey are not REMOVING heat properly either hence the crackign of the heads due to over heating...
hummm, thanks Mark...you got me thinking.

cheers

brownbear · 02-11-07, 01:22 PM

Why not take the readings after an hour to confirm the back isn't heating.

Are you using a hand held infared temp gauge to read this?

If so, take the rig for a drive, load it up to max egts for extended interval. Pull off the side of the road and take some readings. Cause if the coolant isn't getting there, then you may have a point.

crushers · 02-11-07, 05:42 PM

yep, infrared...good idea, i might do that tomorrow when i am running around...

ivanhoe · 02-11-07, 06:06 PM

one thing that puzzles me is why the top of the radhose is hot and the lower is cold near the radhose heater?

crushers · 02-11-07, 10:58 PM

ummm ...
convection neaters the hot water flows away from the rad (upward) towards the block so it heats the block before heating the rad...

ivanhoe · 02-12-07, 10:02 PM

Quote:

Originally Posted by crushers

ummm ...
convection neaters the hot water flows away from the rad (upward) towards the block so it heats the block before heating the rad...

what i meant to say is: when you put your hand around the radhose, the lower part is cold and the upper part is hot???

crushers · 02-13-07, 02:27 AM

hummm, i never checked...
my gut feeling is hot water rises and since the hose on the 2LTE is verticle where the heater is installed it would head up to the thermostate first...but i never checked...
cheers

lshobie · 02-13-07, 07:07 AM

I imagine ENS sells block heaters for the 1HZ and 1HDT, I have a mine truck engine and it has a block heater in it. I always liked the block heater, the engine is always toasty. My truck has a block heater in it and I installed a low rad heater to see the difference, I'll be checking it out shortly - I'm just finishing up the truck now.

In my estimation the difference between the 2 is marginal - but will find out soon enough.

Regards,

crushers · 02-13-07, 07:42 AM

curious, where did they locate the block heater...i have yet to see a factory block heater in any 1HZ, HDT, 1PZ....

lshobie · 02-13-07, 08:06 AM

You can just barely see it behind the blue capped A/C hose. Did you ever call ENS to see if they have them?

Regards.

crushers · 02-13-07, 08:12 AM

first frost plug behind the thermostate housing...
interesting...
thanks

crushers · 02-13-07, 08:12 AM

i just checked the EPC and couldn't find a listing... i wonder if it is an aftermarket heater...

lshobie · 02-13-07, 08:15 AM

I'll look into it.

matt 105 · 02-13-07, 03:49 PM

Hmmmm, No fan clutch.

Matt

lshobie · 02-13-07, 03:51 PM

Not yet - but one coming soon.

brownbear · 02-13-07, 08:14 PM

Typically mine trucks don't need block heaters. It isn't cold underground, and they run 24/7. Unless its an open pit. But then they would have fords....etc.

ivanhoe · 02-13-07, 11:08 PM

Quote:

Originally Posted by brownbear

Typically mine trucks don't need block heaters. It isn't cold underground, and they run 24/7. Unless its an open pit. But then they would have fords....etc.

funny, i have two 3BII's from the mining industry and both have blockheaters!

02-10-07, 12:47 PM	#1
crushers IH8MUD Lifer Join Date: Feb 2004 Posts: 9,793	lower rad hose heater reaction time test unit: 1990 LJ78 time 11:05 11:08 11:15 11:20 11:30 upper hose -6.5F -6.5F 2.5F 6.0F 18.1F lower hose -6.5F 31.4F 81.4F 81.8F 68.0F upper rad -6.5F -6.5F 1.3F 1.4F 5.8F Block front -7.8F - 5.4F 3.6F 10.7F 15.4F head rear -9.1F -7.5F -2.1F -3.6F -2.6F cheers __________________ pulling this info out of my ass so take it with a pound of salt "People are poor because they don't spend money wisely, tough sh!t !!! " John Galt 09/22/08 "educate yourself. Sorry if that seems too blunt." John Galt 11-01-08 Wayne in Ontario http://www.ivoac.ca join today

02-10-07, 08:43 PM	#2
brownbear Mod in Hibernation Join Date: Sep 2004 Location: Where diesels purr and turbos whine TLCA# 15584 Posts: 6,183	good info. They heat up nice and quick. __________________ -84 BJ60, Finally on the FN road! -91 FJ80, wife's ride Iron Butt award winner of the Cruise Moab 08 !

02-11-07, 01:38 AM	#3
light_duty IH8MUD Regular Join Date: Oct 2005 Location: in the stacks Posts: 423	confirms what those who use these units knew already...they work. Thanks for the info, Wayne. __________________ Robin 1990 LJ78 2L-TE and LJ78 site, dig?

02-11-07, 06:37 AM	#5
crushers IH8MUD Lifer Join Date: Feb 2004 Posts: 9,793	respectfully disagree, the block heater is not an option on some model engines (HDT,1HZ). i agree about the head but the location for the temp reading was at the very highest back corner of the head and only after 25 min of heating. also, the ease of install of the lower rad hose heater makes it very appealing. you need airflow to pass through the rad to do much in the way of cooling the tempts and i found the front of the block heated up much faster than the rad did showing the coolant was heating the block first similar to the block heater. i am satisfied with the lower rad hose heater. what would be interesting is doing the same test with a block heater to compare the findings. location of testing: upper hose was rad side of the thermostate housing lower hose was just above the heater upper rad was the furthest corner away from the upper inlet for the hose (coldest corner upper part of the rad) block front was under the head front upper corner head rear was the furthest corner away from the heat source just below the tappet cover back corner. hummm, this just brought up another question...maybe the head coolant passeges design is the problem with the 2LT heads, if htey are not warming up properly in the back corners then mayb ethey are not REMOVING heat properly either hence the crackign of the heads due to over heating... hummm, thanks Mark...you got me thinking. cheers __________________ pulling this info out of my ass so take it with a pound of salt "People are poor because they don't spend money wisely, tough sh!t !!! " John Galt 09/22/08 "educate yourself. Sorry if that seems too blunt." John Galt 11-01-08 Wayne in Ontario http://www.ivoac.ca join today

02-11-07, 01:22 PM	#6
brownbear Mod in Hibernation Join Date: Sep 2004 Location: Where diesels purr and turbos whine TLCA# 15584 Posts: 6,183	Why not take the readings after an hour to confirm the back isn't heating. Are you using a hand held infared temp gauge to read this? If so, take the rig for a drive, load it up to max egts for extended interval. Pull off the side of the road and take some readings. Cause if the coolant isn't getting there, then you may have a point. __________________ -84 BJ60, Finally on the FN road! -91 FJ80, wife's ride Iron Butt award winner of the Cruise Moab 08 !

02-11-07, 01:47 AM	#4
Mark W IH8MUD Lifer Join Date: Jan 2005 Location: The Greatland TLCA# 6303 Posts: 3,525	Unimpressive heating at te back of the engine though. I've never understood why anyone would use a rad hose heater. Why waste all that heat into the radiator where it just radiates to the air, instead of keeping the circulation in the engine? Freeze plug heater is the way to go. Mark...

02-11-07, 05:42 PM	#7
crushers IH8MUD Lifer Join Date: Feb 2004 Posts: 9,793	yep, infrared...good idea, i might do that tomorrow when i am running around... __________________ pulling this info out of my ass so take it with a pound of salt "People are poor because they don't spend money wisely, tough sh!t !!! " John Galt 09/22/08 "educate yourself. Sorry if that seems too blunt." John Galt 11-01-08 Wayne in Ontario http://www.ivoac.ca join today

02-11-07, 06:06 PM	#8
ivanhoe IH8MUD Junior Join Date: Jul 2005 Location: north bay, ontario TLCA# 15543 Posts: 146	one thing that puzzles me is why the top of the radhose is hot and the lower is cold near the radhose heater? __________________ ivanhoe SURVIVOR 73fj40 76fj40 78fj45 81bj42 82bj60 85bj60 00hz79 Last edited by ivanhoe; 02-12-07 at 09:59 PM.

02-11-07, 10:58 PM	#9
crushers IH8MUD Lifer Join Date: Feb 2004 Posts: 9,793	ummm ... convection neaters the hot water flows away from the rad (upward) towards the block so it heats the block before heating the rad... __________________ pulling this info out of my ass so take it with a pound of salt "People are poor because they don't spend money wisely, tough sh!t !!! " John Galt 09/22/08 "educate yourself. Sorry if that seems too blunt." John Galt 11-01-08 Wayne in Ontario http://www.ivoac.ca join today

02-13-07, 02:27 AM	#11
crushers IH8MUD Lifer Join Date: Feb 2004 Posts: 9,793	hummm, i never checked... my gut feeling is hot water rises and since the hose on the 2LTE is verticle where the heater is installed it would head up to the thermostate first...but i never checked... cheers __________________ pulling this info out of my ass so take it with a pound of salt "People are poor because they don't spend money wisely, tough sh!t !!! " John Galt 09/22/08 "educate yourself. Sorry if that seems too blunt." John Galt 11-01-08 Wayne in Ontario http://www.ivoac.ca join today

02-13-07, 07:07 AM	#12
lshobie IH8MUD Lifer Join Date: Feb 2004 Posts: 1,859	I imagine ENS sells block heaters for the 1HZ and 1HDT, I have a mine truck engine and it has a block heater in it. I always liked the block heater, the engine is always toasty. My truck has a block heater in it and I installed a low rad heater to see the difference, I'll be checking it out shortly - I'm just finishing up the truck now. In my estimation the difference between the 2 is marginal - but will find out soon enough. Regards, __________________ Louis Check out my youtube videos at: www.youtube.com/lshobie Join the True North Toyota Land Cruiser Club in Ottawa http://landcruisers.ca/

02-13-07, 07:42 AM	#13
crushers IH8MUD Lifer Join Date: Feb 2004 Posts: 9,793	curious, where did they locate the block heater...i have yet to see a factory block heater in any 1HZ, HDT, 1PZ.... __________________ pulling this info out of my ass so take it with a pound of salt "People are poor because they don't spend money wisely, tough sh!t !!! " John Galt 09/22/08 "educate yourself. Sorry if that seems too blunt." John Galt 11-01-08 Wayne in Ontario http://www.ivoac.ca join today

02-13-07, 08:06 AM	#14
lshobie IH8MUD Lifer Join Date: Feb 2004 Posts: 1,859	You can just barely see it behind the blue capped A/C hose. Did you ever call ENS to see if they have them? Regards. Attached Images __________________ Louis Check out my youtube videos at: www.youtube.com/lshobie Join the True North Toyota Land Cruiser Club in Ottawa http://landcruisers.ca/

02-13-07, 08:12 AM	#15
crushers IH8MUD Lifer Join Date: Feb 2004 Posts: 9,793	first frost plug behind the thermostate housing... interesting... thanks __________________ pulling this info out of my ass so take it with a pound of salt "People are poor because they don't spend money wisely, tough sh!t !!! " John Galt 09/22/08 "educate yourself. Sorry if that seems too blunt." John Galt 11-01-08 Wayne in Ontario http://www.ivoac.ca join today

02-13-07, 08:15 AM	#17
lshobie IH8MUD Lifer Join Date: Feb 2004 Posts: 1,859	I'll look into it. __________________ Louis Check out my youtube videos at: www.youtube.com/lshobie Join the True North Toyota Land Cruiser Club in Ottawa http://landcruisers.ca/

02-13-07, 03:49 PM	#18
matt 105 IH8MUD Regular Join Date: Jul 2006 Location: Bowen Basin, QLD Australia Posts: 342	Hmmmm, No fan clutch. Matt __________________ ------------------ a white Landcruiser - now with Track Tactical!

02-13-07, 03:51 PM	#19
lshobie IH8MUD Lifer Join Date: Feb 2004 Posts: 1,859	Not yet - but one coming soon. __________________ Louis Check out my youtube videos at: www.youtube.com/lshobie Join the True North Toyota Land Cruiser Club in Ottawa http://landcruisers.ca/

02-13-07, 08:14 PM	#20
brownbear Mod in Hibernation Join Date: Sep 2004 Location: Where diesels purr and turbos whine TLCA# 15584 Posts: 6,183	Typically mine trucks don't need block heaters. It isn't cold underground, and they run 24/7. Unless its an open pit. But then they would have fords....etc. __________________ -84 BJ60, Finally on the FN road! -91 FJ80, wife's ride Iron Butt award winner of the Cruise Moab 08 !

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